1822Isinglass was first produced at Sandy Bay.Economy and Industry, Industry

Advertisement for Isinglass. Gloucester Telegraph, “American Isinglass.” October 18, 1828, Vol. 2 No. 43 edition.
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Isinglass, a type of gelatin obtained from fish used to make glue and jellies, was produced by William Hall from Boston, who obtained the patent.

Morning, God’s. “Did You Know? (Isinglass).” Good Morning Gloucester (blog), October 25, 2011. https://goodmorninggloucester.com/2011/10/25/did-you-know-isinglass/.
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